These are 5 quality indie games put into a bundle that would cost $80 usually. But they are raising money for charity and let you name the price. They are all DRM free and work on mac, linux and PC.
http://www.wolfire.com/humble (http://www.wolfire.com/humble)
The Humble Indie Bundle (http://www.youtube.com/watch?v=M7Aw5C7WQ6g&feature=player_embedded#lq-lq2-hq-vhq-hd)